
Okay, so the type of pen that you use in your daily routine may not be the most important detail in your life. But when you have a fun and attractive pen to write with, it helps to make your day just a little bit brighter, doesn’t it? In that spirit, we’ve already introduced you to a line of lovely Sailor Moon pens in one of our past articles, but this time, we’ve found some pens that may be a delight for those of you more into the robot/mecha genre. They’re Transformers pens, and yes, they actually change shapes — so Transformers fans, get ready to “transform and roll out” the letters!
The intricately designed pens, made by toy and figure manufacturer Sentinel Co., Ltd., come in three variations — Optimus Prime (or “Convoy”, as he’s known in Japan), Nemesis Prime (or “Black Convoy” in Japan) and a special edition Ultra Magnus.
As you can see, the pens are created in amazing detail to make the transformation from robot into pen possible, and in their robot forms, the figures have fully movable joints, which allows them to carry their blaster weapons in various positions.
▼Here are some pictures of the Optimus Prime pen, in both the robot and pen form, looking quite regal in the bright trademark Optimus colors.
▼This is the Nemesis Prime pen, the dark coloring giving it a sinister yet cool look.
▼And this is the special edition Ultra Magnus pen, available only through the Hobby Link Japan online shop. Collectors will definitely want to check this out!
Well, we have to say, these guys certainly look sleek and stylish! And the fact that you can make them actually transform must be absolutely thrilling to fans of the series. Not surprisingly, the creator of this pen is a passionate fan himself, as he explains by writing in the Sentinel blog, “I love Transformers, and I wanted to work with the concept of having something you can carry around with you that you really like and be able to ‘show it off’, in a way, to people around you. I wanted it to be something practical, and that’s how I came up with the idea of a pen. I also didn’t want to compromise on the form and mobility of the robot; we had to make it look cool, too. In the end, I think we were able to create a product the Sentinel as a company can be proud of. We made sure the pen wasn’t too big, so that it would be easy to write with. It’s a quality pen, and we hope you give it a try!”
The pens are 10.5cm (approx 4 in.) tall in robot form and 14.3cm (5 and 1/2 in.) long as a pen, and all three types are priced at 4,298 yen (US$42). The Optimus Prime pen will come out in September, while the other two pens will be released in October, and apparently, they’ve already started taking pre-orders for the Optimus Prime pen at several online shops. Unfortunately, the pens seem to be sold in Japan only, but we think you’ll still agree that they look pretty darn amazing. Actually, it makes us wonder what we can we look forward to next — maybe Transformers iPhone cases?
Source: Sentinel Co., Ltd. website and blog via ITmedia (all in Japanese)
Photos: Sentinel Co., Ltd. website




















Optimus Prime and Megatron are now officially cute anime girls with Transformers Bishoujo【Photos】
New and improved self-transforming Transformer toys fight, dance, and are overall awesome【Videos】
Write with the power of the moon with this pen — and enjoy a serving of nostalgia as well!
Awesome fan film is more Transformers than Michael Bay could ever handle
This is a pen: These “disposable chopsticks” are all you need to write a letter!
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Cherry blossoms begin blooming in Japan with record-early starts for sakura season
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Universal Studios’ Sailor Moon theme park attraction is finally coming to America
Expo 2025 mascot Myaku-Myaku to release tastefully erotic photo book
Studio Ghibli director Hayao Miyazaki is still drawing…and walking in his Vans
Virtual idol Hatsune Miku redesigned with look that adds new elements and brings back old ones
Fabulous new designer wedding dresses will give you the high-fashion wedding of your dreams
Japanese man gets drunk and falls asleep on Tokyo streets, then gets robbed by foreign national
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
Train station platform ramen store closes its doors on half a century of history in Tokyo
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Studio Ghibli adds new Mother’s Day gift sets to its anime collection in Japan
The next time you’re feeling stressed out, you could relax on a Pokémon Psyduck chair from Japan
Komachi Shokudo: Japanese mum’s-style cooking for breakfast, lunch and dinner in Tokyo
Starbucks Japan opens new cafe and art gallery in top Tokyo tourist neighbourhood
The top 10 graduation songs in Japan as chosen by current Japanese high school students
7-Eleven Japan’s giant fried chicken skewer would be too big to eat, so it’s really for cuddling
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Nine great places to see spring flowers in Japan, as chosen by travelers (with almost no sakura)
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japan’s cherry blossom season predicted to start earlier than we’d thought, especially in Tokyo
Starbucks Japan releases a new Cream Puff Frappuccino for a limited time
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Awesome Transformers 40th anniversary anime short created in famous studio team-up【Video】
Yanmar reveals state-of-the-art tractor – You may never look at farm equipment the same
A trip to the deadline cafe in Tokyo, where staff won’t let you leave until you’re done writing